IS : 4164 - 1976 ( Reaffirmed Reaffirmed 1996 ( 2006 ) ) Indian Standard SPECIFICATION FOR LIFTING `C' HOOKS WITH EYE UPTO25lONNES ( CAPACITY First Revision ) Second Reprint MAY 1997 UDC 621.86.061.1 0 Copyright BUREAU MANAK 1977 STANDARDS OF INDIAW BHAVAN. 9 BAHADIJR SHAH ZAFAR MARC NEW DELHI 110002 Gr 3 June 1977 IS : 4164-1976 Indian Standard LIFTING SPECIFICATION FOR `c' HOOKS WITH EYEUP TO 25 TONNES CAPACITY (First Revision) Lifting Chains, Associated Fittings and Components Committee, MCPD 9 Sectional Chairman SHRI S. MAJIJMDAR Representing Directorate General of Technical New Delhi Development, Members SHRI R. N. MALIK (Alternate to Shri S. Majumdar) DR P. K. CHAKRABORTY Tractel Tirfor India Private Ltd, New Delhi SHRI 0. P. MEHNDIRATTA (Alternate) W. H. Brady & Co Ltd, Bombay SHRI N. B. CHAUDHARI SHRI P. VENKATRAMAN (Altmzate) SHRI B. L. CHITLANCIA Indian Chain Manufacturing Co, Calcutta SHRI PRADIPCHITLANGIA (Alternate) Ministry of Railways DEPUTY DIRECTPR (MET-II) ASSISTANTDIRECTOR (WELDING) (Alternate) DIRECTOR STANDARDSMinistry of Railways DEPUTY (Loco) ASSISTANTDIRECTOR (WELDING) (Alternate) Ministry of Defence (DGI) COL S. B. GHORPADE MAJ D. V. KHER (Alternate) National Test House, Calcutta SHRI S. D. MAZUMDAR Jessop & Co Ltd, Calcutta SHRI S. NAG SHRI A. K. BANGA(Alternate) SHRI P. K. NEVATIA Indian Link Chain Manufacturers Ltd, Bombay Asbok Steel Chain Manufacturers Co, Bombay SHRI V. A. OZA SHRI F. M. FERNANDIZ (Alternate) Tak Machinery Ltd. Bombay SHRI S. G. PRADHAN SHRI S. PAUL (Alternate) SHRI S. RAGHAVAN Ministry of Shipping & Transport (Transport Wing) Calcutta Port Trust, Calcutta SHRI S. C. ROY SHRI B. R. CHATTERJEE (Alternate) L i (Continued on page 2) 0 BUREAU OF Copyright 1977 INDIAN STANDARDS This publication is protected under the Zndiut Copyright Acr (XIV of 1957) and reproduction in whole or in Part by any means except with written permission of the publisher shall be deemed to be an infringement of CoDvrieht under the said Art IS : 4164- 1976 (Continued from page 1) Members SHRI N. P. ROY CHOWDHURY SHRI S. N. BANERJEE (Altnnati) SHRI K. C. SAXENA i Rc~restnting Mining & Allied Machinery Limited, Durgapur Corporation Directorate General Factory Advice Service & Labour Institutes, Bombay SHRI G. VAIDYANATHAN (Alternate) Hindustan Steel Limited, Ranchi SHRI T. C. %ARMA SHRI A. N. DWX-~A (Altemutc) Heavy Engineering Corporation Limited, Ranchi SHRI D. SRmHARAN SHRI P. N. GOWN (Alternate I) SHRI VERADARAJ (Altarnate II) Directorate General of Supplies & Disposals SHRI H. C. VERMA (Inspection Wing), New Delhi Director General, IS1 (&o@cio Member) SHRI P. S. DAS, Director (MCPD) Secretary SHRI A. R. GuL.4-n Assistant Director (MCPD), IS1 IS t 4164- 1976 Indian Standard LIFTING SPECIFICATION FOR `C' HOOKS WITH EYEUP TO 25 TONNES CAPACITY ( First Revision) 0. FOREWORD 0.1 This Indian Standard (First Revision) was adopted by the Indian Standards Institution on 30 November 1976, after the draft finalized by the Lifting Chains, Associated Fittings and Components Sectional Committee had been approved by the Marine, Cargo Movement and Packaging Division Council. 0.2 This standard was first published in 1967. The major changes in this revision relate to the grading of hooks and marking of their lifting capacities Requirements for material have according to the international practice. been revised to give option to the manufacturer of hooks to achieve the desired mechanical strength of the hooks using different types of steels including alloy steels. Hooks of lifting capacity up to 25 tonnes are now covered in this standard. characterized by their shape which is designed to prevent hook against obstructions and reduced risk of displacement hoisting and lowering operations. The hooks are suitable operations and for the loading and unloading of ships and 0.3 `C' hooks are the fouling of the " of the load during for general lifting crafts. 0.4 The reliability of `C' hooks is an important factor and, therefore, supply ofhooks should be obtained from manufacturers possessing adequate facilities for heat-treatment and testing equipment, and employing competent staff for inspection. 0.5 Users are warned that the hooks, provided these are marked with the IS1 mark, shall not be taken as complying with this standard unless specified tests have been made and the test requirements met in the presence of the person representing or approved by the purchaser. 0.6 When the conditions of working are extremely hazardous or severe the permissible working load should be substantially less than the corresponding loads specified in Table 1. 0.7 The hooks are numbered according to their dimensional characteristics which are such that, for a given grade of hook, the maximum lifting capacities are in accordance with the R 10 series of preferred numbers. The number IS : 4164 - 1976 thus defined is called the `pattern number', correspond with the lifting capacity. to make clear that it does not 0.8 For the purpose of deciding whether a particular requirement of this staadard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with The number of significant places retained in the rounded IS : Z-1960*. off value should be the same as that of the specified value in this standard. 1. SCOPE 1.1 This standard covers basic requirements, material `c' hooks with eye of lifting capacity up to 25 tonnes. 1.1.1 This standard has been restricted suitable 1.1.2 covered for use with chains of Grades The requirements in this standard. and dimensions of to `C' hooks of Grades L, M and S 30, 40 and 63 respectively. section only have been of `C.? hooks of trapezoidal 2. TERMINOLOGY 2.1 For the purpose of this standard shall apply. 3. GRADE OF HOOKS the definitions given in IS : 7&$j'-1975t 3.1 The grade of hook is determined by the mechanical properties of the Each grade finished hook and not simply by the strength of the material. is identified by a letter in the series L, M, P, S, T and V. 3.1.1 For Grade L the mean stress at the specified minimum breaking load is 300 N/mm2, for Grade M 400 N/mm2, for Grade S 630 N/mms, for Grades L, M, P, S, T Grade T 800 N/mm2, and for Grade V 1000 N/mm2. and V hooks are to be used with chains of Grades 30, 40, 63, 80 and 100 respectively only. 4. MATERIGL 4.1 The steel shall be produced by the open hearth by any oxygen top blown process. 4.2 In its finished state as supplied or electric process or to the hook maker, the steel shall be *RI&S for rounding off numerical values (rcviscd). tGenera1 characteristics of lifting hooks. 4 IS : 4164 - 1976 fully killed and shall meet the maximum limits as under: sulphtu and phosphorus content Cast analysis percent, Max a) For Grades L and M Hooks : Sulphur Phosphorus For Grade S Hooks : Sulphur Phosphorus 0.050 0.050 0,035 0.035 Check analysis percent, Max 0.055 0.055 0.040 0.040 b) may be used forGrades L 4.2.1 Class 1 and 2 steels of IS : 1875-1971* and M hooks respectively. Any other steel meeting with the mechanical properties requirement of the finished hook specified in this specification may ' `be used. 4.2.2 Alloy steels conforming to IS : 4367-19677 suitably heat treated to meet with the mechanical properties of the hook may be used for Grade S hooks. 4.3 The steel shall be made in conformity with a suitable de-oxidation practice to obtain an austenitic grain size of 5 or finer when tested in accordance with IS : 2853-1964:. 4.3.1 This could be accomplished, for example sufficient aluminium, or equivalent element to hooks stabilized against strain age embrittlement of 0.020 percent of metallic aluminium is quoted by ensuring that it contains enable the manufacture of during service; a minimum for guidance. 4.4 Within the above limitations it is the responsibility of the hook maker to select the steel so that the finished hook suitably heat treated, meets the mechanical properties required by this specification. 5. SHAPE accordance AND DIMENSIONS with Table 1. 5.1 The shape and dimensions of `C' hooks of Grades L, M and S shall be in 5.1.1 For hammer forged hooks, the dimensions given shall be complied with as far as possible, especially those dimensions determining the strength of hook. 5.2 It is not intended that these `C' hooks be fitted with safety catches. Ifrequired, however, a safety catch may be added to a `C' hook and for this purpose it is permissible to flatten the upper point of nose of the hook as shown in Fig. 1. *Specification for carbon steel billets, blooms, slabs and bars for forgings (third revision). tspecification for alloy and tool steel forgings for general industrial use. SMethod of determining austenitic grain si.ze of steel. 5 IS : 4164 - 1976 FIG. 1 FLATTENED `C' HOOK TO TAKE SAFETY CATCH "3 For die making, the construction of hook profile may be carried out by using the dimensions given in Table 1. The order of operations is given in Appendix A. 6. WORKMANSHIP AND FINISH a manner that the macroscopic flow lines follow the body outline of the hook. The finished hook shall be clean and free from coating of any description unless otherwise specified by the purchaser. 7. HEAT 6.1 The hook shall be free from defects and shall be cleanly forged in such TREATMENT 7.1 All hooks shall, before proof testing, be subjected to one of the following heat treatments as agreed to between the purchaser and the manufacturer : a) Normalizing by heating to a temperature within 50°C above the upper critical point of the steel used followed by cooling in still air; and Hardening by heating to a temperature within 50°C above the upper critical point of the steel used followed by quenching in oil or water and tempering. b) 7.1.1 Normalizing treatment shall be permitted up to Grade M hooks only. Grade S hooks shall be hardened and tempered necessarily. 6 & : 4164- 1976 7.1.2 The minimum hardness of the hook after heat treatment when tested according to the method given in IS : 1500-1968* shall be 175 HB. This test shall be carried out on the hook selected for destructive testing. 7.2 Details of heat treatment given to the hooks during manufacture shall be endorsed on the maker's test certificate. 8. PROOF TESTING 8.1 The testing machine shall conform to the requirements specified in Appendix B. 8.2 After heat treatment and other processing, the finished hooks shall be subjected to proof load of twice the safe working load as given in Table 1. prior to the application of the proof load, each hook shall bear two centre punch marks at positions a and b as shown in Fig. 2. The change in distance between a and b before applying proof load and after removal of the proof load will be the amount of permanent set and shall not exceed 0.25 percent of the initial distance. After removal of the proof load and determination of the permanent set, each hook shall be thoroughly examined by a competent person and shall be accepted as complying with this standard if no permanent deformation or visible defect is observed on the hook. NOTE - Locationof point u shall be within 10 mm from the edge on the centre line and that of point b at the centre of the nose radius. Fro. 2 *Method MARKING ON HOOKS for Brine11 hardness test for steel- (first r&&a). 7 IS : 4164 - 1976 9. DESTRUCTION 9.1 TEST A sample hook shall be selected out of a lot of every 50 hooks or less and tested to destruction by the application of the test load. The load shall be applied as specified in 7.3 of IS : 7847-1975". The hook shall, at any load less than four times the safe working load, neither fracture nor so distort as to be incapable of retaining the load. 9.2 Micro-Structure Test - After destruction test, a portion of the hook, which has not undergone deformation shall be ta.ken and micro-structure test shall be carried out to ensure that hooks have been given proper heattreatment. 9.3 Hardness Testing - The hook of Grade S selected for destructive testing shall be tested for hardness value as given in 7.1.2. The hardness shall be checked at least 10 mm away from the surface. 9.4 Other Test - If required by the purchaser, subjected to radiographic/ultrasonic examination. 10. INSPECTION, CERTIFICATE the hooks may also be OF TEST AND EXAMINATION 10.1 The representative of the purchaser shall have access to the works of the manufacturer at all reasonable times for the purpose of witnessing the specified tests and inspecting the machine and methods of examination. The manufacturer shall give the inspector copies of the reports of the tests made in his presence. 19.2 The manufacturer shall supply a certificate of test and examination accordance with 8.2 and 8.3 of IS : 7847-1975*. 11. MARKING 11.1 Provided that the hook passes the proof test, each hook shall be legibly and indelibly marked on parts not highly stressed. This marking shall include at least the following information: a) b) c) d) 11.2 The pattern number, The grade letter, Safe working loa.d, and Manufacturer's identification in mark. BIS Certification Marking The product may also be marked with Standard Mark. `11.2.1 The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The details of conditions under which the licence for the use of Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards. *General characteristics of lifting hooks. 8 IS : 4164- 1976 TABLE (Uwer MI 1 `C' HOOKS 5.3, WITH 8.2 and EYE A-7) OX, 5.1, dimrnsions in millimetrrs. I X I?* n8 n j* 0.71 u L 06 n hf* 0 515 1) .N* 0 RBT* T 0 3t.5 I) 7, B U' 0 425 n I" 0 63 D I)' 7.5\iR .I 4/> s, 0 05 D 1; 0 18 D `L hl (7) ;p 20 25 31.5 40 50 G3 80 100 I25 IGO ZOO 2X 315 400 500 S' (8) Xl (2) 05 O-63 08 I I 2.3 16 2 2 32i 4 ;.3 8 10 (3) 0 fi3 u 8 I I.? 2 25 .t 2 3 i 63 `8 IO I2 i (4) I 0 I25 IG 2-j 2 32 4 :3 I:: 12 5 :: 1-I I6 I8 20 (G) ,;.j :f 25 31 40 50 63 80 100 I2 i I GO 2n0 2 50 315 400 (10) (11) 3 32;5 40 50 63 80 100 125 I60 2OCJ 250 315 4no .5OlJ - 5 37 5 42.5 47 5 53 I 09 I22 13G I50 Ii0 l9U 217. 243 2ti3 300 335 ;;; 475 530 GO0 670 22-4 24 3 27 2 30 34 5 38 7 42 5 48 7 51-S 60 69 77 5 ;' IO6 12`2 132 1% IIR I12 I vt I65 (12) 19 5 21-E 24 3 27 2 30 34-5 31) 7 42.5 47-5 53 GO 67 7s 85 0.5 IO6 II8 (13) I6 I8 20 22.4 25 $5 37.5 40 50 53 56 7: 80 90 100 (14) 14 16 :"o 22.4 2285 31.5 35 5 40 43 7 48 7 54 5 60 69 77.5 85 (1.5) :: $2 23-6 26-5 29 33.5 37.5 12.5 47.5 53 2': 75 85 92-5 (1'3) t: :"o Z6 iY.5ii.8 37.5 z.5 53 60 65 73 82.5 90 24.3 27.2 iy.5 38 7 42 5 47 5 53 GO 67 (17) IO.9 12.2 13.6 15 17 19 (IfJ) I"053 II 8 I3 2 15 16.5 I8 5 21.2 23 6 25.8 30 32 5 38-7 41.2 16 2 51 5 58 (19) II-2 12 8 14 5 I6 I8 22204 25 29 32 5 36 5 41.2 2 56 F3 71 (20) 17 I9 21.2 23 6 27-2 30 33.5 37-5 42 5 47 5 31 5 60 F7 75 85 95 103 (21) 1-5 1.5 2 2 2 25 3 3 `$ 4 5 5 2 7s 8 9 (22) ; 6 67 55" 9.9 II I2 5 1% I.5 17 19 21 2 25 28 30 , As in the Original Standard, this Page is Intentionally Left Blank IS : 4164 - 1976 APPENDIX A (Clause 5.3 and Table 1) GEOMETRICAL A-l. CONSTRUCTION OF HOOK centres a common and the hook. Plot the vertical axis XX and the horizontal axis YY. With and b on XX draw two circles each of diameter D with YY as their tangent. The lower circle, centre a, defines the seat of the hook upper circle, centre b, defines the upper part of the intrados of the A-2. Mark off points c and d on YY at distances V and H+ V respectively from axis XX. With centre c on YY draw a circular arc to pass through c and touch the circles drawn with centres a and 6. With the same centre c draw a circular arc to pass through d. The back of the hook is thus defined. A-3. Mark off point f on XX such that the depth of the section of the hook below the seat is H, that is, at a distance D+ H from axis YY. With cent.re a draw a circular arc from f to join the arc drawn through point d. A-4. Through the centre a of the seat diameter circle draw a horizontal line and mark off point g at a distance of D from a. Draw the perpendicular bisecter offg to meet the YY axis at h. With centre h and radius hf draw a circular arc to pass through f and g continuing it to the TT axis. Define the upper limit of the lower point of the hook by a horizontal line drawn at a distance 0 from centre a. Draw the tip circle of radius Y within the limit prescribed by this line, the arc with centre h and the seat diameter circular with centre a. A-5. Draw a vertical line parallel to XX and distance Y from the outermost part of the lower point of the hook (distance hsf T,) to determine the outer limit of the upper point of the hook. Draw the locus of the lower part of the upper point so as to maintain a hook opening of J. Draw an arc with centre a and radius 1.50 to define the underside of the upper point. Discontinue this arc at a point where the minimum opening 3 is achieved. Draw the tip circle radius 2', to conform with these limits. A-6. Mark off pointj k on XX draw an arc eye 1 at a distance XI able centres m and n circular arcs. A-7. Construction Table 1. on axis XX at a distance A from pointf. With centre of radius N to pass through j. Mark the centre of the below k and draw the eye of diameter 7-r. With suitcomplete the profile of the upper portion of the hook these are specified in the figure in of the cross section; 11 IS: 4164 - 1976 APPENDIX (CZause 8.1) REQUIREMENTS B-1. The machine tolerance of f5 B MACHINES within OF TESTING shall be accurate enough to take measurements percent of the proof load applied. B-2. Machines measuring the load by levers and weights or by pendulum shall be verified and adjusted, as necessary by a competent independent person at intervals not greater than one year. For machines measuring the load other than by levers and weights or by pendulum, the interval shall be not greater than three months. The testing machine shall be balanced in the presence of the inspector before the tests are made. B-3. played A signed certificate of the last examination adjacent to the machine. shall be prominently &s- 12 BUREAU OF INDIAN STANDARDS Manak Shavan, 9 Bahadur Shah Zatar Marg, NEW DELHI llooo2 Tdephones: 323 0131, 323 3375, 323 9402 Fax : 91 113234062, 91 113239399, 91 113239382 fetegrams : Manaks~~~lha (Common to all OhIces) Cetrtrei~: Plot No. 20/9, Site IV, Sahibabad Industrial Area, SAHIBABAD Region8l Central `Eastern onloee:_323 76 17 337 86 62 603843 235 23 15 632 Q2 Q5' 201010 Telephane 8776Q32 : Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI 110002 : l/14 CIT Scheme VII M, V.I.P. Road, Maniktota, CALCUTTA700054 335-336, Sector 34-A, CHANDIGARH 160022 Northern : SC0 Southern : C.I.T. Campus, IV Cross Road, CHENNAI 600113 tWestern : Manakalaya, EQ Behind Mar01 Telephone Exchange, An&eri (East), MUMBAI 400093 Branch Oftices: `Pushpak'. Nurmohamed Shaikh Marg, Khanpur. 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